JP2005264564A - Seismic strengthening material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compactly designed seismic strengthening material which enhances earthquake resistance of a building, and which can simplify work for being mounted on a column etc. <P>SOLUTION: This seismic strengthening material 1 mainly comprises: a pair of plate parts 2a and 2b which present a plate shape and which are fixed to respective opposed surfaces 6 of the column 4 and a beam 5, orthogonal to each other; and an elastically deformable leaf spring part 11 which has linear extension parts 10a and 10b each extended from an approximately arc-shaped curved part 8 protrusively curved toward a crossing part 7 where the column 4 and the beam 5 cross each other, and curved ends 9a and 9b at both the ends of the curved part 8, and which connects the pair of plate parts 2a and 2b together. Both a compressive load and a tensile load, which are brought about by a shock caused by earthquakes etc., are absorbed by the elastic deformation of the leaf spring part 11, so that the earthquake resistance of the building can be enhanced. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a seismic reinforcement, and in particular, by utilizing the elastic repulsive force of a leaf spring, it is possible to absorb the impact and load applied to the building due to an earthquake or the like and prevent the building from collapsing. It relates to seismic reinforcement.

  Conventionally, the building has been designed to be earthquake resistant so that it can be prevented from being deformed or collapsed even when the building is shaken or subjected to a strong impact due to an earthquake, etc. Therefore, their seismic standards and strengths are strictly defined. Therefore, building designers, contractors, etc. are performing construction of buildings in compliance with such standards.

  Generally, in wooden buildings, a mortise hole is drilled in the base, and a part of the pillar (tenon) formed in accordance with the inner peripheral shape of the mortise is inserted, and the pillar is orthogonal to the base. Let stand in the state. And in order to strengthen the joining of the pillar and the foundation in such a standing state, a fixing means such as a gravel is used. In addition, when a beam is laid over a column, it is the same as that for the above-mentioned foundation. Furthermore, it is a common practice to improve the strength of buildings by connecting so-called “bars” that are diagonally crossed along a diagonal of a quadrangle composed of columns, beams, foundations, and the like. After these seismic reinforcement work, the exterior of the room is improved by covering it with wall materials so that the pillars and beams do not directly enter the occupant's vision.

  In addition, not only the above-mentioned wooden buildings, but also various earthquake-resistant reinforcement works are made for concrete buildings constructed by the RC method, etc., so that they can sufficiently withstand earthquakes of ordinary seismic intensity. It has become.

  On the other hand, after taking measures for earthquake resistance by the bracing described above, an elastic member (for example, a damper such as a coil spring or an impact buffer such as a shock absorber) is interposed between the pillar and the beam. However, the load (load) applied to the building due to an earthquake or the like absorbs the load by deformation of the elastic member due to expansion and compression, and further prevents the deformation and collapse of the building by the restoring force of the elastic member. It is disclosed (see Patent Document 1).

JP 2004-36139 A

  However, the conventional seismic reinforcement members such as the above-mentioned shading and bracing are reinforced by simply rigid members in order to improve the strength of the building. It was just what I did. Therefore, up to the load assumed in the design in advance, the effect can be fully exerted and applied to the building. However, when a load exceeding the assumed load is applied, the column and beam There was a case where the joint state such as, etc. collapsed, and the deformation or collapse of the building was inevitable. In particular, when the limit load is slightly exceeded, the angle between the column and the beam will be deformed and returned to the original state (the state where the column and the beam are orthogonal and holding 90 degrees). I could not. Therefore, the restoring force (elastic recovery force) against the deformation of the building does not act, leading to the collapse of the building as the deformation starts, or the building may be kept in a deformed state. As a result, damage caused by earthquakes and the like has increased, and in addition, the construction of the building has been costly.

  On the other hand, a member having a stretchable member such as a coil spring or an elastic body interposed between a column and a beam, etc., due to the elastic deformation of the stretchable member, the column and the beam etc. by a restoring force even when a load is applied. Was able to be restored to its original state. However, these elastic members are generally arranged in a state where they are bridged in an oblique direction with respect to columns, beams, and the like, and the expansion / contraction direction substantially coincides with the longitudinal direction of the elastic members. Therefore, for example, when a coil spring is used as the stretchable member, one of the direction in which the coil spring extends (direction in which the coil pitch expands) and the direction in which the coil spring is compressed (direction in which the coil pitch decreases). Was deformed when a load was applied.

  Therefore, in particular, when a load is applied in the direction in which the coil spring is compressed, the coil pitch gradually becomes narrower and eventually the coil pitch may become zero. That is, the springs of the coil springs are in close contact (a state in which the springs are completely contracted), and no further deformation is possible. As a result, the load due to an earthquake or the like could not be sufficiently absorbed. In other words, when a load is applied that reduces the angle between the column and the beam, the allowable angle (for example, between 80 degrees and 90 degrees) is limited depending on the coil spring, and the elasticity The effects of elastic deformation and restoring force due to the members could not be fully enjoyed, which could lead to collapse of the building.

  In addition, in general, when these elastic members are interposed between columns and beams, they are often attached in a state of being stretched or compressed in a predetermined direction by an operator's hand in advance. In other words, in a normal state where no load is applied, a slight tension is applied to the coil spring or the like, that is, the coil spring is slightly extended from the initial state, or is compressed, and the columns and beams etc. In addition to strengthening the bonding between the two, the vibration of the coil spring itself during installation is suppressed. Therefore, at the time of such attachment work, a worker who stretches the coil spring or the like may be burdened with a great deal of labor, and a lot of attachment work time is required. Therefore, the thing which can make attachment work of an earthquake-proof reinforcement material easy was desired.

  In addition, in the vicinity of the intersections of these columns and beams, various lines and pipes related to the above described braces, gas, water supply, electricity, and the like may pass. In addition, since the columns and beams are covered with the above-mentioned wall materials, the seismic reinforcement is within the width of these wall materials and has sufficient seismic performance, and affects the above-mentioned piping and the like. It was necessary to form as compact as possible.

  Therefore, in view of the above circumstances, the present invention has an object to provide a seismic reinforcing material designed in a compact manner that can improve the earthquake resistance of a building and can be easily attached to a pillar or the like. is there.

  In order to solve the above-mentioned problem, the seismic reinforcing material of the present invention is provided in the vicinity of a crossing portion where a horizontal member including a column and a beam and a base arranged orthogonal to the column crosses, and the crossing portion A pair of support plate portions each having a substantially plate shape fixed to the opposing surfaces of the column and the horizontal member facing each other, with the respective one end portions separated from the intersection point, and opposed to the intersection point A curved portion having a substantially arc shape that is curved in a convex shape, and a pair of extended portions that are respectively extended from the curved end portions of the curved portion, and each of the extended portions is provided between the support plate portions. And an elastically deformable leaf spring portion connected by a main body.

  Here, the support plate portion is a plate-like (plate shape) that is fixed between the plate spring portion and a horizontal member such as a column and a beam or a base, and supports the plate spring portion. It is made of a strong material such as a steel plate. And these support board parts are conventionally fixed to the pillar etc. by the well-known fixing means in buildings, such as a screw. At this time, the one end portion of the support plate portion is formed in a state of being separated from the crossing point of the crossing portion where the pillar and the horizontal member cross each other by a predetermined distance. Therefore, the deformation due to the column and the horizontal portion when a load is applied is not hindered, and the force caused by the vibration can be transmitted to the leaf spring portion described later as it is.

  On the other hand, the leaf | plate spring part has the extending part extended from the curved part which curved in the substantially circular arc shape, and the curved edge part of the both ends of a curved part, respectively. And by the structure which concerns, both when a load (compressive load) which makes a mutual extension part approach is applied, and when a load (tensile load) which makes a mutual extension part separate is applied In (1), these loads can be absorbed when the elastically deformable bending portion is deformed. The extending portions are connected to the respective support plate portions so that the leaf spring portions project in a convex shape with respect to the intersecting portions where the pillars and the horizontal members intersect with each other. ing. The connection between the extending portion and the support plate portion is not particularly limited, and examples thereof include fixing by a countersunk screw and a nut through a through hole penetrating the support plate portion. As a result, the seismic reinforcement is interposed against the horizontal members such as columns and beams in such a state that only the extended portion is in contact with the support plate portion and almost the curved portion is separated from the plate surface of the support plate portion. Established.

  Therefore, according to the seismic reinforcing material of the present invention, the seismic reinforcing material is attached in the vicinity of the intersection where the column and the horizontal member including the beam or the base intersect. The seismic reinforcement has a leaf spring portion that can be elastically deformed, and the extension portion of the leaf spring portion is in the longitudinal direction of the column and the horizontal member with the respective support plate portions sandwiched therebetween. It is fixed so as to substantially match. Thereby, the load by the deformation | transformation which concerns on a leaf | plate spring part comes to be transmitted with a deformation | transformation of a pillar and a horizontal member. At this time, when a load is applied to the column and the horizontal member due to an earthquake or the like, the angle between the horizontal member perpendicular to the column and the column is deformed, and the angle is widened (that is, 90 degrees or more). In the case of deformation), the leaf spring portion connected to the support plate portion expands and deforms so that the pair of extending portions are separated from each other. And the distance between the extended parts which expanded one end restore | restores to the original state again by the effect | action of the leaf | plate spring part which can be elastically deformed. On the other hand, when the angle is narrowed (that is, when the angle is deformed to 90 degrees or less), the leaf spring portion connected to the support plate portion is deformed so that the pair of extending portions approach each other. And the distance of the extended part which approached one end restore | restores to the original state again by the effect | action of the leaf | plate spring part which can be elastically deformed. Thereby, the load applied to the column and the horizontal member due to an earthquake or the like can be absorbed by the elastic force of the leaf spring portion, and the shock can be buffered. As a result, it is possible to avoid the risk of building deformation and collapse.

  In addition, the leaf spring part can be used in advance that is manufactured in a curved state so as to have a predetermined arc diameter by a spring manufacturing factory or the like. There is no need to perform an operation of attaching the support plate to the support plate while deforming the spring. Therefore, a large amount of labor is not required for the attachment work of the leaf spring portion, and an excessive work load is not imposed on the operator. In addition, although it is suitable to install the earthquake-proof reinforcing material of the present invention in advance when building a new building, it can also be easily performed when installing in a renovation after construction.

  Furthermore, in addition to the above configuration, the seismic reinforcing material of the present invention may be “arranged in the vicinity of a pair of crossing portions corresponding to either one of vertical symmetry and left-right symmetry”. .

  Therefore, according to the seismic reinforcing material of the present invention, a pair (one set) of seismic reinforcing materials is arranged with respect to the pair of intersecting portions positioned vertically or horizontally. Here, the load applied to the horizontal member such as a column and a beam is basically either that the angle between the column and the horizontal member expands (increases) or decreases (decreases). . These deformations occur alternately in the crossing portions that face each other or are adjacent to each other, and the phenomenon of angular expansion deformation and narrowing deformation occurs alternately. Therefore, by arranging a pair of seismic reinforcing members of the present invention as a set so as to be able to cope with both of such deformations, it becomes possible to mutually absorb deformation due to compressive load and tensile load due to earthquakes, etc. It becomes possible to further improve the earthquake resistance of objects.

  Furthermore, the seismic reinforcing material of the present invention has, in addition to the above configuration, “the length from the intersection of the intersections to the other end of the support plate is set to 200 mm or more and 400 mm or less, and the support plate And the width of at least one of the leaf spring portions may be set to 80 mm or more and 100 mm or less.

  Therefore, according to the seismic reinforcing material of the present invention, the size of the seismic reinforcing material attached in the vicinity of the crossing portion is such that the length from the crossing point of the crossing portion to the other end of the support plate portion is 200 mm or more, 400 mm or less, More preferably, it is set to 250 mm or more and 350 mm or less, more preferably 280 mm or more and 320 mm or less, and the width of at least one of the support plate part and the leaf spring part is 80 mm or more and 100 mm or less, more preferably 85 mm or more and 95 mm or less. Is set to Here, the pillar and the horizontal member are generally present in a space covered with a wall material, and the water, gas, electricity, and the like that need to be supplied to the room in addition to the pillar and the horizontal member in the space. Various pipes and wiring such as telephones pass. In addition, conventional seismic reinforcements such as the braces mentioned above are also installed. Therefore, the wall material is in a dense state with various things. In addition, the wall width between the rooms is often designed to be about 100 mm. Therefore, by using the seismic reinforcement of the present invention in the above-described compact size, it becomes possible to impart sufficient seismic resistance without affecting existing facilities such as waterworks. In particular, the earthquake resistance can be improved without deteriorating the aesthetics of the wooden building.

  As an effect of the present invention, it is possible to impart earthquake resistance to the building by utilizing the elastic deformation of the leaf spring portion. Furthermore, compared with the case where a conventional elastic member is used, it is possible to cope with both a compressive load and a tensile load applied to a column, a beam, and the like. It can be taken larger compared to etc. As a result, the earthquake resistance is improved and the risk of deformation and collapse of the building can be avoided. Furthermore, since the mounting operation is completed simply by fixing the leaf spring portion, which has been curved in a predetermined shape, to the support plate portion, the operator is not burdened with excessive labor related to the mounting operation. In addition, because it can be made relatively compact, it can be installed without affecting the existing facilities and the aesthetics of the room, and is not limited to newly built buildings, but should be installed when renovating existing buildings. Can also be done easily.

  Hereinafter, an earthquake-resistant reinforcing material 1 according to an embodiment of the present invention will be described with reference to FIGS. 1 to 6. Here, FIG. 1 is an exploded perspective view showing the configuration of the seismic reinforcement 1 according to the present embodiment, FIG. 2 is a side view showing an installation example of the seismic reinforcement 1, and FIG. Fig. 4 is a front view showing an example, Fig. 4 is a front view showing the configuration of the plate portions 2a, 2b, and Fig. 5 is an explanatory view schematically showing the deformation of the seismic reinforcement 1 with respect to the compressive load P and the tensile load T. FIG. 6 is a (a) side view and (b) plan view schematically showing an application example to the wooden building 3. In addition, in the earthquake-proof reinforcement material 1 of this embodiment, what is interposed between the pillar 4 and the beam 5 orthogonal to the pillar 4 is illustrated. Here, the beam 5 corresponds to the horizontal member in the present invention.

  As shown mainly in FIGS. 1 to 4, the seismic reinforcement 1 of the present embodiment has a pair of plate portions 2 a and 2 b that have a plate shape fixed to the opposing surfaces 6 of the pillars 4 and the beams 5 orthogonal to each other. And a curved portion 8 having a substantially arc shape curved convexly toward the intersecting portion 7 where the columns 4 and the beams 5 intersect, and straight lines extending from the curved end portions 9a and 9b at both ends of the curved portion 8, respectively. And a plate spring portion 11 that is elastically deformable and has a plate-like extension portion 10a, 10b and is connected between the pair of plate portions 2a, 2b by the extension portions 10a, 10b. .

  More specifically, the plate portions 2a and 2b have screw holes 13 through which the fixing screws 12 for fixing the plate portions 2a and 2b to the columns 4 and the beams 5 are inserted, respectively, in six vertical rows and two horizontal rows. A total of twelve in two rows are drilled. The plate portions 2a and 2b have two fixing bolt holes 15 vertically through which fixing bolts (head screws) 14a and 14b for connecting and fixing the extending portions 10a and 10b of the leaf spring portion 11 are inserted. Has been formed. Here, the fixing bolt hole 15 is formed with a reduced diameter with respect to the bolt insertion direction (corresponding to the lower side of the drawing sheet and the lower left side of the drawing in FIG. 1) in accordance with the inclination of the bolt heads of the fixing bolts 14a and 14b. (The screw holes 13 are formed in the same manner as the fixed screws 12). Thereby, the front end portions 19a and 19b of the plate portions 2a and 2b and the plate portions 2a and 2b are fixed apart from the intersection 7a of the intersection portion 7 of the column 4 and the beam 5. Therefore, the plate portions 2a and 2b do not hinder the deformation of the pillar 4 and the beam 5 when a load is applied to the building.

  On the other hand, as described above, the leaf spring portion 11 is mainly composed of the curved portion 8 and the extending portions 10a and 10b. Further, the extending portions 10a and 10b include fixing bolt holes of the plate portions 2a and 2b. Spring holes 16 are formed at positions opposite to 15. The plate spring portion 11 is fixed to the plate portions 2a and 2b by fixing nuts 17a and 17b having female screws formed so as to be screwable with the male screws provided at the tips of the fixing bolts 14a and 14b. It joins using the fixed washer 18 intervened between nut 17a etc. and the extension part 10a etc. FIG.

  The overall size of the seismic reinforcement 1 of the present embodiment is such that the other end portions 20a and 20b of the plate portions 2a and 2b from the crossing point 7a of the crossing portion 7 of the column 4 and the beam 5 (the leaf spring portion 11). The length from the crossing point 7a of the crossing part 7 to the one end part 19a, 19b of the plate part 2a, 2b is 20 mm. Each is set to be. Further, the widths of the plate portions 2a and 2b and the leaf spring portion 11 are set to 90 mm, respectively. Thereby, the seismic reinforcement 1 of this embodiment can be stored in the range of 300 mm x 300 mm x 90 mm.

  Next, an example of the case where the seismic reinforcement 1 according to this embodiment is used and deformed due to a load will be mainly described with reference to FIG. Here, a pair of seismic reinforcing members 1 are installed so as to be symmetric with respect to the column 4. Then, when an earthquake occurs and a swing in a predetermined direction (for example, the horizontal direction F in FIG. 5) occurs in the building to which the seismic reinforcement 1 of this embodiment is attached, a load is applied to the building due to the swing. In the intersecting portion 7 where the pillars 4 and the beams 5 intersect, the angle between the pillars 4 and the beams 5 changes. Here, the angle θa (see FIG. 2) between the column 4 and the beam 5 is usually about 90 degrees. However, when a load due to rolling occurs, the angle θb in the left direction in FIG. 5 changes to 90 degrees or more, while the angle θc in the right direction in the figure changes to 90 degrees or less.

  At this time, a tensile load T is generated in the column 4 and the beam 5 in the left direction of the drawing, and a compressive load P is generated in the column 4 and the beam 5 in the right direction of the drawing. And the seismic reinforcement 1 of this embodiment absorbs each load T and P with the elastically deformable leaf | plate spring part 11, and when load T etc. lose | disappear with the restoring force of the leaf | plate spring part 11, it is original. (See FIG. 2). In particular, as shown in FIG. 5, by arranging the pair of seismic reinforcements 1 symmetrically, it is possible to cope with both loads at once and to further improve the earthquake resistance of the building. it can.

  Furthermore, because it is 300 mm square and narrower (90 mm) than the pillar 4, it does not significantly affect the electrical wiring that passes through the interior of the wall material, and has sufficient earthquake resistance. Can be made. In particular, since the leaf spring portion 11 protrudes toward the crossing portion 7, the electrical wiring and the like of the seismic reinforcing material 1 of the present invention are compared to the conventional coil springs that are slanted over the pillars and beams. Even if it protrudes to the side, there is no particular problem. Therefore, it is possible to have a margin in the arrangement of the electric wiring and the like.

  In addition, the seismic reinforcement 1 according to the present embodiment does not require much labor for the work for installing the column 4 and the beam 5 or the like. That is, since the leaf spring portion 11 having the curved portion 8 curved in advance with a predetermined curvature or the like is simply attached to the plate portions 2a and 2b, the coil spring is previously compressed or tensioned in a predetermined direction as in the prior art. Thus, it is not necessary to apply a tension between the column 4 and the beam 5, and the work load can be reduced. Furthermore, by changing the leaf spring portion 11, the load bearing capacity against the compressive load P and the tensile load T can be adjusted as appropriate. Moreover, since the leaf | plate spring part 11 is not directly fixed to the pillar 4 and the beam 5, but is attached via plate part 2a, 2b, the change of the above-mentioned leaf | plate spring part 11 can be performed more easily. .

  Therefore, as shown in FIGS. 6A and 6B, the vertical and horizontal directions are symmetrical with respect to the crossing portions 7 with respect to the pillars 4 and the beams 5 or the bases 5 a of the wooden building 3. By arranging in, the earthquake resistance of the whole wooden building 3 can be improved.

  The present invention has been described with reference to preferred embodiments. However, the present invention is not limited to these embodiments, and various modifications can be made without departing from the spirit of the present invention as described below. And design changes are possible.

  That is, in the seismic reinforcement 1 of this embodiment, what was mainly applied with respect to the wooden building 3 was shown, However, It is not limited to this, For the concrete building etc. which were constructed by other RC methods etc. Of course, it does not matter even if it applies to.

It is a disassembled perspective view which shows the structure of a seismic reinforcement. It is a side view which shows the example of attachment of a seismic reinforcement. It is a front view which shows the example of attachment of a seismic reinforcement. It is a front view which shows the structure of a plate part. It is explanatory drawing which shows typically a deformation | transformation of the earthquake-proof reinforcement material with respect to a compressive load and a tensile load. It is the (a) side view and (b) top view which show typically the example of application with respect to a wooden building.

Explanation of symbols

1 Seismic reinforcement 2a, 2b Plate part (support plate part)
3 Wooden buildings 4 Pillars 5 Beams (horizontal materials)
5a Foundation (horizontal material)
6 opposing surface 7 crossing part 7a crossing point 8 bending part 9a, 9b bending end part 10a, 10b extension part 11 leaf spring part 19a, 19b one end part 20a, 20b other end part P compression load T tensile load

Claims (3)

It is provided in the vicinity of the intersection where the columns and the horizontal members including the beams and the bases arranged orthogonally to the columns intersect, and facing each other in a state in which each end is separated from the intersection of the intersections A pair of support plate portions each having a substantially plate shape fixed to the opposing surfaces of the pillar and the horizontal member,
A curved portion having a substantially arc shape that is convexly curved toward the intersection point, and a pair of extending portions that are respectively extended from the curved end portions of the curved portion, and each between the support plate portions And an elastically deformable leaf spring portion connected by the extending portion.   The seismic reinforcing material according to claim 1, wherein the seismic reinforcing material is disposed in the vicinity of the pair of intersecting portions opposed to either one of vertical symmetry and left-right symmetry. The length from the intersection point of the intersection part to the other end of the support plate part is set to 200 mm or more and 400 mm or less,
The earthquake-resistant reinforcing material according to claim 1 or 2, wherein a width of at least one of the support plate portion and the leaf spring portion is set to 80 mm or more and 100 mm or less.

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